11 



^ 



DIDYNAMIA ANGIOSPERMIA, 



BUCHNERA. Gen. Pl. 1035. 



Ca lijx 



5 



tie lit at us. 



Corollw limb us 5-fi- 

 diis^ aeqiiali'^5 lobis ob- 

 cordatis. Capnda 5- 

 lociilaris. 



Ca hjx 



5-toothed. 



Border of the Corolla 

 5 -cleft, equal, Ayitlithc 

 lobes obcorclatc; 



Ccqjsuh 5-cellcd. 



1. Americana. 



B. caule simplici ; 

 foliis lanceolatis, su])- 

 dentatis, asperis, tri- 

 nervibus ; 

 motifloris. 





spicis re 



Stem simple; leaves 

 lanceolate^ slightly 

 toothed, rough, 3-ner- 

 ved ; spikes with the 

 floAvers remote* 



Sp, pl. 3. p. 334. Walt. p. IGD. Mich. 2- p- 18, Pursh 2. p. 421. 



Perennial. Stem from 1 — 2 feet high, terete and with the whole plant 

 scahrous and a little hairy. Leaves opposite, sessile. Floivcrs at fii^^ 

 crowded on the spikes, becoming remote as the spike lengtiiens. Bracfea^^^ 

 leaf at the base of each flower, ovate, acute, nerved, with two lateral leaves 

 smaller, linear-lanceolate. Calyx cylindrical, slightly hicarved, nervei 

 with the border somewhat bilabiate, tlie upper Up 3-clcft, tlie lower 2-pari- 

 €d,the segments all erect, acute. Corolla hairy, purple, the tube twice a^ 

 long as the calyx, and a little incurved, the two upper segments of the bor- 

 der ratfier smaller than the lower. Stamens very short, in the tube of the 

 corolla. Sti/lc shorter than the stamens. Stigma obtuse. Seerls several jn 

 each cell of the capsule, luiTowed, attached to a central receptacle. 



Grows in damp pastures. Common, 

 Fly wers from IMay to September. 



ANTIRRHINUM. Gex. Pl. 1007. 



C 



alj/x 5-pliyllus. 

 Corolla calcarata^ rin- 



rictu clauso^pal- 



G;ens 



^ 



Hto prommeiite 



Cap 



Ca lyx 

 Corolla beariiiff ^ 

 spur, ringent, with the 



throat closed and the 



